Hi, On Tue 01 Dec 20, 11:43, Maxime Ripard wrote: > On Sat, Nov 28, 2020 at 03:28:26PM +0100, Paul Kocialkowski wrote: > > The A31 CSI controller supports two distinct input interfaces: > > parallel and an external MIPI CSI-2 bridge. The parallel interface > > is often connected to a set of hardware pins while the MIPI CSI-2 > > bridge is an internal FIFO-ish link. As a result, these two inputs > > are distinguished as two different ports. > > > > Note that only one of the two may be present on a controller instance. > > For example, the V3s has one controller dedicated to MIPI-CSI2 and one > > dedicated to parallel. > > > > Update the binding with an explicit ports node that holds two distinct > > port nodes: one for parallel input and one for MIPI CSI-2. > > > > This is backward-compatible with the single-port approach that was > > previously taken for representing the parallel interface port, which > > stays enumerated as fwnode port 0. However, it is now marked as > > deprecated and the multi-port approach should be preferred. > > > > Note that additional ports may be added in the future, especially to > > support feeding the CSI controller's output to the ISP. > > > > Signed-off-by: Paul Kocialkowski <paul.kocialkowski@xxxxxxxxxxx> > > --- > > .../media/allwinner,sun6i-a31-csi.yaml | 86 ++++++++++++++++--- > > 1 file changed, 73 insertions(+), 13 deletions(-) > > > > diff --git a/Documentation/devicetree/bindings/media/allwinner,sun6i-a31-csi.yaml b/Documentation/devicetree/bindings/media/allwinner,sun6i-a31-csi.yaml > > index 1fd9b5532a21..3bcee2d44f3c 100644 > > --- a/Documentation/devicetree/bindings/media/allwinner,sun6i-a31-csi.yaml > > +++ b/Documentation/devicetree/bindings/media/allwinner,sun6i-a31-csi.yaml > > @@ -43,6 +43,7 @@ properties: > > # See ./video-interfaces.txt for details > > port: > > type: object > > + deprecated: true > > I'm not sure we want to deprecate it. There's some SoCs with the same > controller but without the MIPI-CSI block where this would be completely > valid I think we'll need to deprecate it when adding support for the ISP anyway, so I figured we might as well do it now. But I'm okay to postpone this for now. > > properties: > > endpoint: > > @@ -67,6 +68,59 @@ properties: > > > > additionalProperties: false > > > > + ports: > > + type: object > > + > > + properties: > > + port@0: > > + type: object > > + description: Parallel input port, connect to a parallel sensor > > + > > + properties: > > + reg: > > + const: 0 > > + > > + endpoint: > > + type: object > > + > > + properties: > > + remote-endpoint: true > > + > > + bus-width: > > + enum: [ 8, 10, 12, 16 ] > > + > > + pclk-sample: true > > + hsync-active: true > > + vsync-active: true > > + > > + required: > > + - bus-width > > + - remote-endpoint > > + > > + required: > > + - endpoint > > + > > + additionalProperties: false > > + > > + port@1: > > + type: object > > + description: MIPI CSI-2 bridge input port > > + > > + properties: > > + reg: > > + const: 1 > > + > > + endpoint: > > + type: object > > + > > + properties: > > + remote-endpoint: true > > + > > + required: > > + - remote-endpoint > > + > > + additionalProperties: false > > There's a schema for the OF-graph now, you'll want to use it. I didn't know that, thanks for the tip! Will look into it. Cheers, Paul -- Paul Kocialkowski, Bootlin Embedded Linux and kernel engineering https://bootlin.com
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